The Tor Browser: content/media/webaudio/AudioProcessingEvent.cpp@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim:set ts=2 sw=2 sts=2 et cindent: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #include "AudioProcessingEvent.h"

     8 #include "mozilla/dom/AudioProcessingEventBinding.h"

     9 #include "AudioContext.h"

    11 namespace mozilla {

    12 namespace dom {

    14 NS_IMPL_CYCLE_COLLECTION_INHERITED(AudioProcessingEvent, Event,

    15                                    mInputBuffer, mOutputBuffer, mNode)

    17 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(AudioProcessingEvent)

    18 NS_INTERFACE_MAP_END_INHERITING(Event)

    20 NS_IMPL_ADDREF_INHERITED(AudioProcessingEvent, Event)

    21 NS_IMPL_RELEASE_INHERITED(AudioProcessingEvent, Event)

    23 AudioProcessingEvent::AudioProcessingEvent(ScriptProcessorNode* aOwner,

    24                                            nsPresContext* aPresContext,

    25                                            WidgetEvent* aEvent)

    26   : Event(aOwner, aPresContext, aEvent)

    27   , mPlaybackTime(0.0)

    28   , mNode(aOwner)

    29 {

    30   SetIsDOMBinding();

    31 }

    33 JSObject*

    34 AudioProcessingEvent::WrapObject(JSContext* aCx)

    35 {

    36   return AudioProcessingEventBinding::Wrap(aCx, this);

    37 }

    39 already_AddRefed<AudioBuffer>

    40 AudioProcessingEvent::LazilyCreateBuffer(uint32_t aNumberOfChannels,

    41                                          ErrorResult& aRv)

    42 {

    43   AutoPushJSContext cx(mNode->Context()->GetJSContext());

    44   nsRefPtr<AudioBuffer> buffer =

    45     AudioBuffer::Create(mNode->Context(), aNumberOfChannels,

    46                         mNode->BufferSize(),

    47                         mNode->Context()->SampleRate(), cx, aRv);

    48   MOZ_ASSERT(buffer || aRv.ErrorCode() == NS_ERROR_OUT_OF_MEMORY);

    49   return buffer.forget();

    50 }

    52 }

    53 }

The Tor Browser / file revision

content/media/webaudio/AudioProcessingEvent.cpp@97036ab72558

content/media/webaudio/AudioProcessingEvent.cpp